but as u.s. military leaders struggle over how to bring women into ground combat training, two young women soldiers have already proven they've got what it takes. we get their story tonight from our chief pentagon correspondent jim miklaszewski. >> come on, man. >> reporter: it's grueling, downright brutal, and at times borders on physical torture. >> i'm beat. >> why are you letting go? >> reporter: it's the sapper leader training course for combat engineers. conducted in the back woods of fort leonardwood, missouri, it is one of the toughest combat schools in the army. >> this is a dirty, nasty, tough course, and it is going to test you in ways that perhaps some people just don't want to be tested. >> reporter: and the only combat training of its kind that accepts women. first lieutenant audrey motin and second lieutenant carly turnidge have signed up to try to earn the coveted title. sapper. both are graduates of west point. motin was in the seventh grade on 9/11 and decided then she would joi